Products

Products

Product list

KDHG-HT Comprehensive tester for transformer characteristics

KDHG-HT All-in-One Transformer Tester is designed for versatile use in diverse environments, including:

  1. Power System Maintenance

    • Routine inspection of CTs/PTs in substations and power grids to ensure operational safety and compliance with standards (e.g., GB1207, GB1208).
    • Field testing for fault diagnosis, insulation verification, and performance evaluation under real-world conditions.
  2. Factory Acceptance Testing

    • Quality control in manufacturing facilities to validate CT/PT specifications, including excitation curves, ratio accuracy, and polarity before deployment.
  3. Research & Development Laboratories

    • Characterization of CT/PT behavior under varying loads, voltages, and currents for R&D purposes, supporting innovation in electrical engineering.
  4. Field Commissioning

    • On-site testing during installation of new equipment, ensuring accurate calibration and eliminating errors in critical infrastructure projects.
  5. Educational & Training Institutions

    • Hands-on training for students and technicians on CT/PT principles, testing methodologies, and fault analysis.

KDJB-1200Y Six-Phase Microprocessor Relay Protection Tester – Secondary Protection Calibration Instr

The KDJB-1200Y Six-Phase Relay Protection Tester is ideally suited for use in power substations, power plants, and electrical testing laboratories. It is widely applied in commissioning, routine maintenance, and troubleshooting of modern digital and electromechanical protection relays in high-voltage and medium-voltage power systems. The instrument performs reliably in field environments with variable temperature and humidity, making it a trusted tool for protection engineers during system upgrades, relay calibration, and fault simulation tests. Its robust design and portable size also make it effective in mobile testing units and on-site service operations.

KDDT-10A Portable Ground Grid Conductivity Tester

The KDDT-10A Ground Conductance Tester is designed for a wide range of environments where grounding system integrity and safety are critical:

  1. Industrial Facilities:

    • Used in manufacturing plants, chemical factories, and heavy machinery to test grounding connections of high-voltage equipment, ensuring operational safety and compliance with industrial standards.
    • Resists dust, vibration, and moderate humidity (≤80% RH), suitable for harsh production environments.
  2. Power Systems:

    • Deployed in substations, power stations, and transmission networks to measure grounding electrode resistance and bonding continuity.
    • Operates reliably in outdoor conditions (e.g., temperature range: -10°C to 40°C) and withstands electromagnetic interference for accurate readings.
  3. Building Infrastructure:

    • Applied in commercial and residential buildings to evaluate lightning protection systems, grounding rods, and electrical panel connections.
    • Compact and portable design allows testing in confined spaces, such as electrical rooms or utility tunnels.
  4. Research & Development:

    • Utilized in laboratories for material testing, grounding performance analysis, and R&D of new grounding technologies.
    • High precision (±(0.5%+2d)) ensures reproducible results for scientific studies.
  5. Outdoor & Remote Sites:

    • Designed for fieldwork in remote areas, construction sites, or temporary installations where grounding systems need periodic verification.
    • Durable casing and 10A DC output ensure stability in fluctuating environmental conditions.

Environmental Tolerance:

  • Temperature: -10°C to 40°C
  • Humidity: ≤80% RH (non-condensing)
  • Durability: Shock-resistant housing, anti-corrosion components, and continuous operation capability.

Smart Enamel Wire Softening Breakdown Testing Machine with Integrated Detection and Analysis

The KDZD-JC Softening Breakdown Tester is specifically designed for evaluating the insulation performance of enameled round wires, film-wrapped round wires, and flat wires with a conductor diameter of 0.020mm to 3.000mm or flat wires up to 10mm×2mm in size after thermal softening. It complies with international and national standards such as GB/T4074.6-2008/IEC 60851-6 and JB/T4279.8-2008, making it suitable for quality control in wire and cable production, R&D validation of new materials or processes, and standard compliance testing. The device automates critical functions including temperature measurement, control, and adjustment, as well as the application of load and voltage to the sample, with automatic detection of breakdown events through precise current thresholds (5±0.5mA for fixed-temperature methods and 20±1mA for rising-temperature methods). Its capabilities span fixed-temperature testing (heating to a target temperature before evaluation) and rising-temperature testing (direct heating with voltages of 100V±10V or 155V±10V), ensuring reliable data for assessing insulation integrity under thermal stress. The tester’s compact design (450×380×500mm) and automated workflow, including preheating, load application, and real-time monitoring, make it ideal for laboratories, manufacturing facilities, and research institutions requiring high-precision, repeatable results in compliance with rigorous industry standards.

Ultra high voltage withstand mobile testing machine, power frequency intelligent induction AC series

Application Scenario: KDXB(L)-100kVA/100kV Mobile High-Voltage Withstand Test System

The KDXB(L)-100kVA/100kV Mobile High-Voltage Withstand Test System is specifically designed for on-site insulation testing of high-voltage systems in the rail transit industry. It is widely used in maintenance depots and manufacturing facilities for high-speed trains, EMUs (Electric Multiple Units), and urban rail vehicles.

In a typical application, the mobile test unit is wheeled directly to the train maintenance bay. Engineers connect the high-voltage output terminal of the system to the train’s main high-voltage power cable, while grounding the return path securely. The capacitive load of the cable (up to 0.031μF) is automatically recognized by the system, which then initiates an automatic resonant tuning process to achieve optimal test conditions at 50Hz.

Using the intuitive touch-screen interface on the control trolley, operators set the required test voltage—up to 100kV AC—and duration (typically 60 minutes). Once initiated, the system automatically ramps up the voltage, monitors real-time parameters (high-voltage, current, frequency), and maintains a stable output with less than 1.0% voltage fluctuation. If any abnormality occurs—such as flashover, overcurrent, or overvoltage—the system immediately triggers protective shutdown mechanisms, ensuring safety for both personnel and equipment.

After the test is completed, the system automatically reduces the voltage and cuts off the power supply. Test results, including peak voltage, duration, and any fault events, are saved internally and can be printed or exported via USB for documentation and compliance reporting.

Thanks to its modular, split-body design, the system is easy to transport and assemble on-site. The rugged construction, integrated casters, and shock-absorbing mounts make it ideal for industrial environments. Meeting international standards such as GB/T 16927 and IEC 60270, this mobile test solution provides a reliable, efficient, and safe method for performing high-voltage withstand tests in real-world conditions.

Termination Oil Cable Testing Terminal

The applications covered include routine cable testing according to IEC, ANSI/IEEE, and other national standards

KDZR-ZH 10A DC Resistance and Transformer Ratio Integrated Tester

The application scenarios of the "KDZR-ZH" distribution transformer direct resistance ratio comprehensive tester mainly focus on the maintenance, repair, and troubleshooting of the power system. Specific application scenarios include but are not limited to the following aspects:

Regular inspection of distribution transformers: For operating distribution transformers, regular DC resistance and transformation ratio tests can help detect equipment aging and operational status, ensuring their normal operation.
Acceptance testing after new installation or maintenance: After the installation or maintenance of a new distribution transformer is completed, the use of this tester can verify whether the equipment is correctly installed and whether the maintenance is effective, ensuring that the equipment can be safely connected to the power grid for operation.
Troubleshooting: When a distribution transformer malfunctions, direct current resistance and transformation ratio tests can quickly locate the problem, such as winding short circuits, open circuits, etc., to guide the repair work.
Expansion or renovation of power system: When expanding or renovating the power system, it is necessary to test the newly added distribution transformers to ensure that they meet the system requirements and can seamlessly integrate with the existing system.
On site portable testing requirements: Due to the use of large capacity lithium batteries for power supply, this tester is particularly suitable for on-site environments without stable external power supply, such as remote distribution stations or outdoor temporary electrical facilities for testing.

Transformer Dielectric Loss Tester

Application scenario example:
Power equipment testing: used to measure the dielectric loss value of transformer oil paper insulation system and evaluate the degree of insulation aging.
Factory test: Verify whether the insulation performance of transformer bushing, winding and other components meets the standards (such as IEC 60422).
Preventive maintenance: Predict potential insulation failure risks by regularly measuring tan δ values.

Double clamp grounding resistance voltage tester

Application scenarios and advantages
Typical application areas
Power system: Testing the grounding network of substations and transmission and distribution lines to ensure the safe operation of equipment.
Communication base station: Grounding resistance testing for iron towers and computer rooms to ensure signal stability.
Industrial facilities: maintenance of grounding systems in oil fields and factories to prevent lightning strikes.
New energy: Grounding performance evaluation of photovoltaic power plants and wind farms.
core competitiveness
Multi functional integration: One machine for multiple uses, reducing the burden of carrying equipment and lowering procurement costs.
High precision and anti-interference: Adapt to complex electromagnetic environments through pole changing and filtering techniques.
Intelligent data management: Bluetooth/USB real-time transmission, cloud analysis function, to improve operation and maintenance efficiency.
User friendliness: Simple two-wire method and double clamp method simplify the wiring process, suitable for non professionals to quickly get started.

Industrial Grade Thermal Imaging Instrument

Electrical fault diagnosis:
Detect overheating issues in electrical equipment such as transformers, switchgear, and cable joints, and identify potential fault points in advance (such as loose connections and insulation aging).
In power inspection, thermal imaging is used to quickly locate high-temperature abnormal areas, avoiding equipment damage or power outages.
Building insulation and heat leakage analysis:
Detect the thermal insulation performance of walls, roofs, doors and windows, and identify areas with air leakage, moisture, or insulation material failure.
Analyze the thermal distribution uniformity of heating systems (such as underfloor heating and air conditioning) and optimize energy efficiency.
Pipeline and HVAC system testing:
Identify leakage points or insulation damage in water and steam pipelines.
Check the heat exchange efficiency of the HVAC system to improve operational stability.

PD-Free Withstand Voltage Test Equipment

Here is the **English translation** of the practical application scenarios for **PD-Free Testing (Partial Discharge-Free Testing)**:
1. Factory Testing of Power Transformers/Reactors**  
- **Purpose**: Verify the insulation performance of high-voltage transformers/reactors under rated voltage to ensure no insulation degradation caused by partial discharge (PD).  
- **Scenarios**:  
  - Insulation strength testing between transformer windings and core.  
  - Detecting internal voids, oil-paper insulation defects (e.g., moisture, impurities).  
  - Insulation system verification for UHV (Ultra High Voltage) transformers (e.g., ±800 kV DC transformers).  
2. Insulation Testing of High-Voltage Cables and Accessories**  
- **Purpose**: Ensure cable joints, terminations, and other accessories are free from PD-induced breakdown risks during long-term operation.  
- **Scenarios**:  
  - Acceptance testing after cable installation (e.g., underground cables, submarine cables).  
  - Detecting micro-pores, mechanical damage, or uneven semi-conductive layers in cable insulation.  
  - Voltage ratings: 10 kV–500 kV, especially for cross-linked polyethylene (XLPE) cable systems.  
3. GIS (Gas-Insulated Switchgear) and Circuit Breaker Testing**  
- **Purpose**: Validate the SF6 gas insulation performance of GIS to avoid failures caused by PD.  
- **Scenarios**:  
  - Insulation testing of GIS busbars, disconnectors, and earthing switches.  
  - Detecting metal particles, insulator cracks, or assembly errors causing discharge.  
  - Applicable to transmission systems of 110 kV and above.  
4. Insulation Verification for Renewable Energy Equipment**  
- **Purpose**: Ensure insulation reliability of wind power/photovoltaic equipment (e.g., wind turbines, inverters, pad-mounted substations) in harsh environments.  
- **Scenarios**:  
  - Humidity-resistant insulation testing for offshore wind farm step-up transformers.  
  - Analyzing discharge characteristics of PV inverter high-voltage insulation materials.  
  - Detecting insulation stress issues caused by frequent switching or harmonics.  
5. Traction Power Supply System Testing for Electrified Railways**  
- **Purpose**: Guarantee safe operation of traction transformers and catenary insulators under high load.  
- **Scenarios**:  
  - PD detection in traction transformers under 25 kV AC power supply.  
  - Insulation performance verification of catenary insulators in high-humidity/dusty environments.  
  - Preventing traction system tripping or train shutdowns due to discharge.  
6. Research and Development of New Insulation Materials**  
- **Purpose**: Evaluate discharge characteristics of novel insulation materials (e.g., nano-composites, eco-friendly gases).  
- **Scenarios**:  
  - Laboratory simulation of PD thresholds under extreme voltages.  
  - Comparing traditional epoxy resins with new eco-friendly insulation materials.  
  - Providing test data for revisions of IEEE, IEC, and other international standards.  
 **7. Preventive Maintenance of Power Equipment**  
- **Purpose**: Regularly inspect insulation conditions of operational equipment to identify latent defects.  
- **Scenarios**:  
  - Annual insulation testing of substation transformers and capacitors.  
  - Detecting insulation aging (e.g., oil-paper carbonization) in aging equipment.  
  - Preventive replacement of high-risk equipment to reduce unplanned outages.  
 **8. HVDC (High-Voltage Direct Current) System Testing**  
- **Purpose**: Ensure insulation stability of DC cables and converter transformers under continuous DC voltage.  
- **Scenarios**:  
  - Long-term PD analysis of ±500 kV/±800 kV DC cables.  
  - Performance verification of valve hall insulators in high-altitude or polluted environments.  
  - Addressing space charge accumulation issues in DC electric fields causing PD.  
**9. Aerospace and Military Equipment Testing**  
- **Purpose**: Ensure fail-safe insulation for electrical equipment in high-reliability scenarios.  
- **Scenarios**:  
  - PD detection in aircraft high-voltage distribution system insulation materials.  
  - Anti-extreme-environment insulation testing for military radars and shipboard power systems.  
  - Insulation life assessment of nuclear plant safety-grade transformers.  

 

RD2612 Smart Displacement Current Detector Capacitance & Inductance Tester

Application Scenario:

The Smart Displacement Current and Capacitance Tester is designed for field engineers and maintenance professionals engaged in the testing of power systems, particularly in substations and distribution networks. It is ideal for real-time measurement of capacitive current, system grounding conditions, and zero-sequence voltage (3U₀) under various PT (Potential Transformer) wiring configurations, including 3PT, 4PT, and 1PT setups.

Thanks to its wide measurement range, fast response, and intuitive interface, the device is especially suited for:

  • Detecting abnormal capacitance currents in high-voltage systems

  • Verifying system grounding effectiveness

  • Monitoring insulation performance in cable lines and transformers

  • Troubleshooting early-stage faults or insulation degradation

  • Supporting routine diagnostic and preventive maintenance in substations

Its compact, lightweight design, combined with high-accuracy digital signal processing and multi-protection circuits, makes it an indispensable tool for power utility companies, substation operators, and electrical equipment manufacturers.

KD2675 Power Frequency AC Withstand Voltage Testing Equipment for High Voltage Cables

The AC Withstand Voltage Test Device is widely used in power system equipment testing, including transformers, switchgear, insulators, bushings, cables, and electrical components. Its intuitive 7-inch touch screen (optional 10-inch), fully digital calibration, and automatic/manual test modes make it suitable for both field and laboratory environments.

With real-time display of voltage, current, and status, as well as intelligent safety reminders and result judgment, the device ensures fast and accurate dielectric strength tests. It is ideal for:

  • Factory routine testing of high-voltage apparatus

  • On-site commissioning of substations and power stations

  • Preventive maintenance in power grid companies

  • R&D and lab testing in electrical equipment manufacturing

  • High-voltage insulation performance validation after repairs or overhauls

The system enhances safety and efficiency with voice alarms, flashing high-voltage warnings, password-protected settings, and multi-device compatibility, offering a modern solution for high-voltage withstand testing needs.

Portable Microcomputer Capacitance Current Analyzer

**Product Introduction: Handheld Capacitive Current Tester**  

In China's power systems, ungrounded neutral points are common. Single-phase ground faults generate capacitive currents from line-to-ground capacitance, often causing arcing that leads to system failures. Regulations require arc suppression coils when capacitive currents exceed 30A (10kV) or 10A (35kV), necessitating accurate measurement. Additionally, stray capacitance combined with PT parameters may trigger dangerous ferroresonance overvoltages, requiring precise capacitance measurement for risk assessment.  

Traditional methods (e.g., direct single-phase grounding, external capacitance injection) involve high-risk operations on primary equipment, with complex procedures and low efficiency. Modern PT secondary-side signal injection avoids these risks by applying low-level out-of-band signals to the PT open delta terminals, eliminating interference with protection systems or PT operations while bypassing 50Hz noise. However, existing instruments are bulky and inconvenient for fieldwork.  

Our company has developed a new generation of handheld capacitive current testers, miniaturized through advanced design. Key features include:  
- **Compact & Portable**: Redesigned hardware with ARM processor and high-speed ADC reduces size/weight for easier field use.  
- **Efficient Measurement**: Integrated digital frequency conversion inverter combines dual-frequency signals into one waveform; Fourier analysis extracts amplitude/phase data in a single test, improving efficiency.  
- **Enhanced Accuracy**: New algorithms address measurement errors in 4PT configurations, ensuring precision.  
- **Safe & Non-Intrusive**: No direct connection to primary equipment; signals injected via PT open delta terminals ensure safety and compliance.  

This tester solves limitations of traditional methods, offering safer, faster, and more reliable capacitance and current measurements for modern power systems.  

---

**Key Improvements Over Previous Models:**  
- Smaller size and lighter weight for portability.  
- All-digital variable-frequency power supply and optimized signal processing.  
- Simultaneous dual-frequency analysis for one-step measurement.  
- Specialized algorithms for 4PT configuration accuracy.  

Ideal for routine maintenance and fault diagnosis in 10kV/35kV networks, ensuring compliance with arc suppression requirements and ferroresonance risk assessment.

KDCJ-20Z touch screen intelligent impact withstand voltage tester

Application Scenarios of KDCJ-20Z Touchscreen Intelligent Impulse Withstand Voltage Tester**
The **KDCJ-20Z Touchscreen Intelligent Impulse Withstand Voltage Tester** is a high-precision instrument designed to perform full-wave lightning impulse voltage tests on various power equipment. It is widely used in the fields of power systems, electrical equipment manufacturing, scientific research institutions, and quality inspection departments. Below are its main application scenarios:
1. **Power Transmission and Distribution Equipment Testing**
- Used to evaluate the insulation performance of transformers, circuit breakers, insulators, switchgear, and other high-voltage equipment under simulated lightning conditions.
- Ensures that equipment can withstand transient overvoltages caused by lightning strikes or switching surges.
 2. **Electrical Equipment Manufacturing and Quality Control**
- Applied in production lines and R&D labs for testing new products' dielectric strength.
- Helps manufacturers comply with international standards (e.g., IEC) and improve product reliability and safety.
3. **Research and Development in Electrical Engineering**
- Utilized by universities and research institutes for studying insulation materials, protective devices, and high-voltage technologies.
- Provides accurate and repeatable impulse waveforms for experimental analysis.
 4. **Preventive Maintenance and Field Testing**
- Deployed by utility companies and maintenance teams to assess the condition of aging equipment in substations and transmission lines.
- Ensures long-term operational safety and reduces the risk of unexpected outages.
 5. **Certification and Compliance Testing**
- Employed by testing laboratories to conduct standardized lightning impulse tests required for product certification (e.g., CE, UL, IEC).
- The built-in waveform evaluation algorithm ensures compliance with international test standards.
6. **Training and Educational Institutions**
- Used in technical training centers and educational institutions to teach students about high-voltage testing techniques and insulation coordination principles.
7. **Special Industrial Applications**
- Applied in industries such as rail transit, oil & gas, and renewable energy where high-reliability electrical systems are critical.
- Ensures that control systems, converters, and protection devices can withstand harsh electrical environments.
With features like touchscreen control, integrated waveform display, database management, and fast discharge protection, the **KDCJ-20Z** provides a safe, efficient, and user-friendly solution for high-voltage impulse testing across a wide range of applications.

 679    1 2 3 4 5 6 7 8 9 10 Next page Last page